(Czechoslovakia) Early Cie Franco-Roumaine de Navigation Aerienne, Prague to London, no arrival ds, Steidl commercial corner cover franked 1922 air surcharge set of 3 on cover (+additional 250H ordinary stamps) , orange red/grey blue/white etiquette CSR-A-1, rated a great rarity by Mair.Early item in superb condition, and tied by 'Praha-Lettiste/26 VIII 24/CSP' cds. Nice item.
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